Asbestos in Construction: What to Do When Workers Are Exposed
Asbestos in construction remains the single biggest cause of work-related deaths in the UK. More workers die from asbestos-related disease every year than from any other occupational cause — and the vast majority of those deaths were entirely preventable. If you suspect workers on your site have been exposed to high levels of asbestos, what you do in the next few minutes matters enormously.
This post covers your immediate obligations, your legal duties as an employer, decontamination procedures, health monitoring, and — critically — how to prevent this situation from arising in the first place.
Immediate Actions: The First 30 Minutes
Stop Work and Evacuate the Area
The moment you suspect asbestos-containing materials (ACMs) have been disturbed, stop all work immediately. Don’t attempt to assess the damage, clean anything up, or investigate further — just get everyone out of the affected area.
Ensure all personnel move well clear of the contaminated zone. Seal off the area where possible to prevent fibres spreading to other parts of the site, and make sure no one re-enters until a licensed asbestos contractor has assessed the situation.
Report It Without Delay
Workers must report the incident to their supervisor immediately. Supervisors must escalate to the site’s health and safety lead without delay.
Under the Control of Asbestos Regulations and the Reporting of Injuries, Diseases and Dangerous Occurrences Regulations (RIDDOR), certain asbestos incidents must be formally reported — this is not optional. Document everything from the outset: who was present, what work was being carried out, which materials were disturbed, and the exact time. This record is critical for health monitoring, insurance purposes, and any future legal proceedings.
Contact a Licensed Asbestos Contractor
Do not attempt any further investigation or clearance work without licensed professionals. The HSE requires that licensed asbestos contractors carry out any work involving high-risk ACMs — including sprayed coatings, asbestos insulation, and asbestos insulating board (AIB).
Attempting to manage this in-house without the correct licence is not just illegal — it puts more people at risk and compounds your liability significantly.
Employer Legal Responsibilities Under the Control of Asbestos Regulations
Employers working in construction have clear, non-negotiable duties under the Control of Asbestos Regulations. Ignorance of those responsibilities is not a defence in law.
Conducting a Suitable Risk Assessment
Before any construction work begins on a building that could contain asbestos, a suitable and sufficient risk assessment must be completed. This means identifying whether ACMs are present, assessing the likelihood of disturbance, putting control measures in place before work starts, and updating assessments if site conditions change.
If you’re working on a building constructed before 2000, assume asbestos is present until a survey proves otherwise. That’s not overcaution — it’s the correct professional approach and it’s what the HSE expects.
Providing Adequate Asbestos Awareness Training
All workers who could encounter ACMs during their normal duties must receive asbestos awareness training. This includes not just specialist trades but electricians, plumbers, joiners, and general labourers working in older buildings.
Training must cover:
- How to identify materials likely to contain asbestos
- The health risks associated with asbestos exposure
- What to do if they encounter or suspect ACMs
- The correct use of PPE and decontamination procedures
- Site-specific emergency procedures
Training must be refreshed regularly and records kept. A worker who wasn’t trained cannot protect themselves — and an employer who failed to provide that training carries full liability for the consequences.
Providing the Right Safety Equipment
Employers must supply appropriate personal protective equipment at no cost to the worker. For high-level asbestos exposure scenarios, this means:
- Respiratory protective equipment (RPE): minimum FFP3 disposable masks or half-face respirators with P3 filters; powered air-purifying respirators (PAPRs) or full-face respirators for higher-risk tasks
- Disposable coveralls: Type 5 category minimum, sealed at wrists, ankles, and collar
- Gloves: disposable nitrile or similar
- Eye protection: where there is risk of fibre contact
PPE must be in good condition, correctly sized, and workers must be trained on how to put it on, take it off, and dispose of it safely. Equipment sitting in a box on site is worthless — it must be used correctly every single time.
Decontamination: Getting It Right
Inadequate decontamination is one of the most common ways asbestos fibres spread beyond the original work area. It’s also entirely avoidable with the right procedures in place.
Personal Decontamination
Any worker who has been in a contaminated area must follow a strict decontamination procedure before leaving the site:
- Move to a designated decontamination unit or area (on licensed work, a three-stage decontamination unit is a legal requirement)
- Remove PPE carefully, working from the outside in to avoid disturbing settled fibres
- Bag all used PPE and contaminated clothing immediately in clearly labelled, sealed waste bags
- Shower thoroughly, washing hair and skin
- Change into clean clothing
Never allow potentially contaminated clothing to be taken home. Asbestos fibres can transfer to family members — a phenomenon known as secondary exposure, which has caused mesothelioma in people who never worked with asbestos directly.
Site Decontamination and Cleanup
Site cleanup after unplanned asbestos disturbance must be carried out by a licensed contractor. They will conduct air monitoring to establish fibre levels, use HEPA-filter vacuums and wet suppression methods to control fibres, and carry out a thorough visual inspection and clearance air test before the area is re-occupied.
Do not allow the area to be re-entered until a four-stage clearance procedure has been completed and a certificate of reoccupation has been issued. All asbestos waste must be disposed of in accordance with the Environmental Protection Act and relevant waste regulations.
Health Monitoring for Exposed Workers
Once an exposure incident has occurred, the health of every affected worker must be actively monitored. Asbestos-related diseases can take 15 to 40 years to develop — early detection genuinely improves outcomes, and ongoing surveillance is both a legal duty and a practical necessity.
Initial Medical Assessment
Arrange an occupational health assessment for all workers who may have been exposed. This typically includes a detailed exposure history, lung function testing (spirometry), and a chest X-ray where clinically indicated.
Ensure workers are registered with their GP and that the GP is made aware of the occupational exposure. Workers should be advised to disclose their asbestos history at any future medical consultation — it’s directly relevant to diagnosing conditions that may not appear for decades.
Ongoing Health Surveillance
Under the Control of Asbestos Regulations, workers engaged in licensed asbestos work must be under health surveillance by an HSE-appointed doctor, with regular reviews typically required every three years.
Even for workers exposed through an unplanned incident rather than routine licensed work, best practice is to enrol them in a health surveillance programme. Your occupational health provider can advise on the appropriate frequency of review based on the level and duration of exposure.
Mental Health and Wellbeing
The psychological impact of a significant asbestos exposure incident is real and frequently underestimated. Workers who know they’ve been exposed may experience serious anxiety about their future health — and that anxiety is entirely understandable given the circumstances.
Employers should provide access to counselling or employee assistance programmes, and ensure workers receive clear, honest information about what the exposure means and what monitoring is in place. Uncertainty is often harder to cope with than a straightforward fact.
Selecting and Supervising Licensed Asbestos Contractors
Not all asbestos work requires a licence, but in the aftermath of a high-level exposure incident involving asbestos in construction, you will almost certainly need a licensed contractor. Cutting corners here is not an option.
Verifying a Contractor’s Licence
Check the HSE’s online register of licensed asbestos contractors before appointing anyone. A legitimate contractor will provide their licence number without hesitation — be wary of anyone who cannot or will not do so.
When selecting a contractor, also look for:
- Relevant experience with your type of building or ACM
- Clear method statements and risk assessments for the planned work
- Evidence of appropriate insurance
- A track record of compliance — ask for references and check them
Your Ongoing Responsibilities as Principal Contractor
Appointing a licensed contractor doesn’t transfer your responsibilities as employer or principal contractor. You must ensure a competent person supervises the work, review and approve method statements before work begins, check that correct PPE and decontamination facilities are in place, and maintain records of all work, air monitoring results, and clearance certificates.
These records are not optional paperwork. They are a legal requirement and essential protection for your business if the situation is ever subject to HSE investigation or legal proceedings.
Documentation and Compliance Records
Good record-keeping is the backbone of asbestos compliance. Employers must maintain clear, accurate, and up-to-date records covering:
- Asbestos surveys and management plans for all relevant premises
- Risk assessments and method statements for each job involving ACMs
- Training records for all workers
- PPE issue and inspection logs
- Air monitoring results
- Waste consignment notes for all asbestos waste
- Health surveillance records
- Incident reports and near-misses
Store these securely and ensure they are accessible for HSE inspections, insurance audits, and any future legal inquiries. Health surveillance records in particular must be kept for 40 years — asbestos-related diseases have an exceptionally long latency period.
Workers’ Rights and Legal Protections
Construction workers exposed to asbestos in construction have legal rights — both in terms of the protections their employer must provide and their right to seek compensation if they develop an asbestos-related disease as a result of workplace exposure.
Asbestos-related diseases — including mesothelioma, asbestos-related lung cancer, asbestosis, and pleural thickening — are recognised industrial diseases under UK law. Workers, and in some cases their families, may be entitled to claim compensation through civil litigation or through the government’s Industrial Injuries Disablement Benefit scheme.
If you’ve been exposed and are concerned about your rights, specialist asbestos disease solicitors can advise on your options. Many operate on a no-win, no-fee basis.
The Right Survey Before Work Begins: Prevention Over Reaction
The most effective way to manage an asbestos exposure incident in construction is to prevent one from happening in the first place. That means ensuring the correct asbestos survey is completed before any refurbishment or demolition work begins — every time, without exception.
A management survey identifies ACMs under normal occupation conditions and is appropriate for buildings that are in use and not undergoing significant work. It tells you what’s there and how to manage it safely during day-to-day operations.
For any refurbishment or demolition project, a refurbishment survey must be completed before work starts on the affected areas. This is an intrusive survey — it goes beyond visual inspection to identify ACMs that may be hidden within the fabric of the building, precisely where construction workers are most likely to disturb them.
Skipping or cutting corners on either survey type is where the majority of unplanned exposure incidents originate. The survey isn’t a bureaucratic hurdle — it’s the single most important step in keeping your workers safe.
Which Survey Do You Need?
The type of survey required depends on the nature of the work being planned:
- Building in normal use, no planned intrusive work: management survey to establish what’s present and how to manage it
- Refurbishment, fit-out, or alteration work: refurbishment survey covering all areas to be disturbed
- Full or partial demolition: refurbishment and demolition survey covering the entire structure or the areas to be demolished
If you’re unsure which survey applies to your project, speak to a qualified asbestos surveyor before work begins. Getting this wrong at the outset is how incidents happen.
Asbestos Surveys Across the UK
Supernova Asbestos Surveys operates nationwide, with specialist teams covering major cities and regions across England. Whether you need an asbestos survey in London, an asbestos survey in Manchester, or an asbestos survey in Birmingham, our surveyors are BOHS-qualified and fully accredited to carry out both management and refurbishment surveys to HSG264 standards.
With over 50,000 surveys completed, we understand the pressures of working in the construction sector — tight timelines, complex buildings, and the need for accurate, actionable results fast.
Frequently Asked Questions
What should I do immediately if workers are exposed to asbestos on a construction site?
Stop all work immediately and evacuate the affected area. Seal off the zone to prevent fibres spreading, report the incident to your health and safety lead, and contact a licensed asbestos contractor before allowing anyone to re-enter. Document everything — who was present, what materials were disturbed, and the time of the incident.
Is asbestos still present in UK construction buildings?
Yes. Asbestos was widely used in UK construction until it was fully banned in 1999. Any building constructed or refurbished before 2000 may contain ACMs, including asbestos insulating board, pipe lagging, floor tiles, textured coatings, and roofing materials. Always assume asbestos is present in pre-2000 buildings until a survey confirms otherwise.
Do I need a licensed contractor to deal with an asbestos exposure incident?
In the majority of cases involving high-level exposure on a construction site, yes. Work involving high-risk ACMs — such as sprayed coatings, asbestos insulation, and asbestos insulating board — must be carried out by an HSE-licensed contractor. You can verify a contractor’s licence status on the HSE’s online register.
What type of asbestos survey is required before construction or refurbishment work?
A refurbishment survey is required before any intrusive construction, refurbishment, or demolition work begins in areas that may contain asbestos. This is a legal requirement under the Control of Asbestos Regulations. A management survey alone is not sufficient for this purpose — it is designed for buildings in normal use, not for pre-work assessment of areas that will be disturbed.
How long do health surveillance records for asbestos-exposed workers need to be kept?
Health surveillance records for workers exposed to asbestos must be retained for a minimum of 40 years. This reflects the exceptionally long latency period of asbestos-related diseases, which can take 15 to 40 years to develop after initial exposure. These records are a legal requirement under the Control of Asbestos Regulations.
Get the Right Survey in Place Before Work Starts
Asbestos in construction is a serious and ongoing risk — but it’s a manageable one when the right surveys, training, and procedures are in place. The time to act is before work begins, not after an incident has occurred.
Supernova Asbestos Surveys provides fast, accurate, fully accredited asbestos surveys for construction and refurbishment projects across the UK. Call us on 020 4586 0680 or visit asbestos-surveys.org.uk to book your survey or speak to one of our qualified surveyors today.